With Boston's cellular service shut down overloaded, it isn't easy for locals to speak with their family and loved ones outside of the city. If you're in Boston and need to make a call, you can use a site set up by Twilio to do so via your browser. You'll need Chrome or Firefox and the Adobe Flash plug-in. If you're reading Lifehacker, chances are you have what you need. Just follow the instructions on the page and you'll be able to call out for free.